<ul>
    <li><a href="index.html" class="<?if($active_menu == 1) echo 'current'?>">Trang chủ</a></li>
    <li><a href="javscript:void(0)" class="<?if($active_menu == 6) echo 'current'?>">Danh mục</a></li>
    <li><a href="gallery.html" class="<?if($active_menu == 2) echo 'current'?>">Bộ sưu tập</a></li>
    <li><a href="blog.html" class="<?if($active_menu == 3) echo 'current'?>">Tin tức</a></li>
    <li><a href="about.html" class="<?if($active_menu == 4) echo 'current'?>">Về chúng tôi</a></li>
    <li><a href="contact.html" class="last <?if($active_menu == 5) echo 'current'?>">Liên hệ</a></li>
</ul>  